Indian Welding Journal

Hideyuki Yamamoto

Abstract

This report summarizes trends of arc welding processes and power sources, especially, recent advances of inverter controlled power sources with various kinds of new current wave control method for gas shielded metal arc welding process.

The features of inverter controlled machine are not only compact and lightweight design but also various improvement of weldability and control of arc welding phenomena such as metal transfer arc plasma characteristics, bead formations etc and features will contribute to much more automization of arc welding.

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Masao Ushio ¹, Hideyuki Yamamoto ¹, Youshinori Nishida ¹, Tsuneo Mita ¹

Affiliations
1 Matsushita Industrial Equipment Co. Ltd, JP

Abstract

Since the 1982 introduction of inverter control technology into an arc welding power source, it has proliferated throughout gas shielded arc welding processes in Japan The requirements for inverter sources have been based upon the improvement of welding performance coming from high-speed control of current, rather on than many improvements on functional aspects such as miniaturization weight reduction and of electricity. Particularly, efforts for the most part have focused on the analyses of welding arc phenomena and how to control the phenomena with external parameters. Consequently varous waveform control systems have been developed.

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